1
$100 How many molecules are in 2 moles of H₂O?
1.2044 × 10²⁴
Convert 10 grams of CO to moles.
0.208 mol
Is melting ice an endothermic or exothermic process?
Endothermic
How is an acid defined according to the Brønsted-Lowry theory?
A proton donor
What is the pH of a neutral solution at 25°C?
7
What is the mass in grams of 3 moles of NaCl?
175.3 g
How many grams of water are produced from 4 mol of H₂?
72 g
Write the formula for calculating heat transfer
Q = mcΔT
Calculate the mole of Na
22.99 g
What is the formula for hydrochloric acid?
HCl
Balance the following chemical equation: __H₂ + __O₂ → __H₂O.
2H₂ + O₂ → 2H₂O
State Boyle’s Law and its equation.
P₁V₁ = P₂V₂
How much heat is absorbed when 2 mol of water vapor condenses at 100°C? (ΔH_vap = 40.7 kJ/mol)
81.4 kJ
What is the pOH of a solution with pH = 3?
11
Which pH indicates an acidic solution?
pH < 7
How many moles are in 1.204 × 10²⁴ molecules of CO₂?
2 mol
Calculate the new pressure if 3 L of gas at 2 atm is compressed to 1.5 L at constant temperature.
4 Atm
What does the First Law of Thermodynamics state?
Energy cannot be created or destroyed only transferred or transformed
What is the neutralization reaction between HCl and NaOH?
HCl + NaOH → NaCl + H₂O
What is the product after alpha decay of uranium-238?
Thorium-234
If 2 mol of Na reacts with excess Cl₂, how many grams of NaCl are formed?
117 g
Describe the Kinetic Molecular Theory of gases.
Gas particles are small, move randomly, and have elastic collisions.
How is calorimetry used to measure heat transfer?
By measuring temperature change in a known mass
What is the primary difference between nuclear fission and nuclear fusion
Fission splits atoms Fusion joins them
What type of radiation is emitted during beta decay?
0.208 mol